Patterns of species richness and abundance among cactus communities receiving different rainfall levels in the semiarid region of Brazil

by Paulo Sérgio Monteiro Ferreira, Sérgio de Faria Lopes, Dilma Maria de Brito Melo Trovão

Leguminosae na APA do Cariri, Estado da Paraíba, Brasil

by Paulo Sérgio Monteiro Ferreira, Dilma Maria de Brito Melo Trovão, José Iranildo Miranda de Melo